Abstract: There is a braking assembly for limiting rotation of a drive shaft in a reverse direction. A hub is fixed for rotation with the drive shaft. The hub has an external cylindrical section and at least one hub pocket on the external cylindrical section. An actuatable brake portion is sized and shaped to be mounted for rotation around the hub. The actuatable brake portion has an internal cylindrical section, at least one brake pocket on the internal cylindrical section corresponding with the at least one hub pocket, and at least one brake shoe. The braking assembly also includes at least one ball.

Abstract: A drive head for a wellhead, the drive head comprising: a rod drive; a pressure chamber; and a rod receiving part connected to the rod drive and enclosed within the pressure chamber. A method comprising: pressurizing a chamber mounted to a wellhead, in which the chamber encloses an upper end of a rod extending from the wellhead; and driving the rod using a rod receiving part enclosed within the chamber.

Abstract: A stuffing box for a wellhead comprises a stationary housing defining a passage for receiving a well tubular, and a tubular shaft mounted on the stationary housing for rotation within the passage and defining an inner axial bore. The inner axial bore is adapted to form a static seal around the well tubular in use, and a dynamic pressure seal is mounted within an annular cavity defined by respective cylindrical surfaces of the stationary housing and the tubular shaft. One or both of the respective cylindrical surfaces are tapered to decrease the radial cross sectional area of a seal travel portion of the annular cavity in an axial direction from a well end of the stationary housing to an opposite second end of the stationary housing.

Abstract: A drive head for a wellhead, the drive head comprising: a rod drive; a pressure chamber; and a rod receiving part connected to the rod drive and enclosed within the pressure chamber. A method comprising: pressurizing a chamber mounted to a wellhead, in which the chamber encloses an upper end of a rod extending from the wellhead; and driving the rod using a rod receiving part enclosed within the chamber.

Abstract: A stuffing box for a wellhead, the stuffing box comprising: a stationary housing defining a passage for receiving a well tubular; a tubular shaft mounted on the stationary housing for rotation within the passage and defining an inner axial bore adapted to form a static seal around a well tubular in use; and a dynamic pressure seal mounted within an annular cavity defined by respective cylindrical surfaces of the stationary housing and tubular shaft, in which one or both of the respective cylindrical surfaces are tapered to decrease the radial cross sectional area of a seal travel portion of the annular cavity in an axial direction downstream from a well end of the stuffing box.

Abstract: An apparatus is disclosed for removing water from gases produced from a hydrocarbon reservoir penetrated by a well, the apparatus comprising: a first conduit extending through the well for producing gases; a second conduit extending through the well for producing liquid hydrocarbons; a pump connected to pump liquid hydrocarbons from the hydrocarbon reservoir through the second conduit; and a gas dehydrator located in the first conduit below a ground surface for removing water from produced gases flowing through the first conduit.